Attachments for use with a surgical access device

ABSTRACT

A surgical access attachment for use with a surgical access device is disclosed. The surgical access attachment includes a ring and an access portion assembly. The ring is configured to engage a proximal portion of a surgical access device. The access portion assembly includes at least one flexible tab having an engagement structure. The engagement structure is configured to selectively engage the ring. The access portion assembly is configured to retain a seal. The access portion assembly is configured to disengage from the ring in response to a predetermined amount of force exerted on one flexible tab of the at least one flexible tab.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.15/652,636, filed on Jul. 18, 2017, which is a continuation of U.S.patent application Ser. No. 14/804,779, filed on Jul. 21, 2015, now U.S.Pat. No. 9,707,011, which claims the benefit of and priority to U.S.Provisional Patent Application No. 62/078,479, filed on Nov. 12, 2014,the entire disclosure of each of which is incorporated by referenceherein.

TECHNICAL FIELD

The present disclosure is directed to various embodiments of attachmentsfor use with surgical access devices. More particularly, the presentdisclosure includes attachments that are removably secured to a proximalportion of a surgical access device and allow instrumentation and/or aclinician's hand to be inserted therethrough.

SUMMARY

The present disclosure relates to a surgical access attachment for usewith a surgical access device. The surgical access attachment includes aring and an access portion assembly. The ring is configured to engage aproximal portion of a surgical access device. The access portionassembly includes at least one flexible tab having an engagementstructure. The engagement structure is configured to selectively engagethe ring. The access portion assembly is configured to retain a seal.The access portion assembly is configured to disengage from the ring inresponse to a predetermined amount of force exerted on one flexible tabof the at least one flexible tab.

In disclosed embodiments, the access portion assembly is configured todisengage from the ring in response to a predetermined amount ofproximally-directed force exerted on one flexible tab of the at leastone flexible tab.

It is also disclosed that the surgical access attachment includes a lipdisposed on the access portion assembly. The lip is configured toselectively engage the ring. It is further disclosed that the at leastone flexible tab consists of one flexible tab, and the lip is disposed180° from the flexible tab. Additionally, it is disclosed that theaccess portion assembly consists of two features that are configured toremovably engage the ring, the two features including the flexible taband the lip. It is further disclosed that a distal-most portion of theflexible tab is co-planar with a distal-most portion of the lip. It isalso disclosed that the ring includes a proximal wall, a distal wall,and an intermediate wall interconnecting the proximal wall and thedistal wall. Each of the lip and the flexible tab is configured toengage a distal surface of the proximal wall of the ring.

In disclosed embodiments, the proximal wall of the ring is configured tobe positioned proximally of a proximal-most portion of a surgical accessdevice.

In disclosed embodiments, the access portion assembly includes aproximal seal retaining portion and a distal seal retaining portion. Itis also disclosed that the at least one flexible tab extends from theproximal seal retaining portion. It is further disclosed that the atleast one flexible tab extends from the proximal seal retaining portion,and the lip extends from the distal seal retaining portion.Additionally, it is disclosed that the at least one flexible tab extendsfrom the proximal seal retaining portion, and at least partially throughan opening of the distal seal retaining portion. It is disclosed thatthe opening of the distal seal retaining portion is defined by aC-shaped projection extending radially outward from an outer ring of thedistal seal retaining portion. It is further disclosed that the proximalseal retaining portion includes a plurality of fingers, and the distalseal retaining portion includes a plurality of engagement apertures.Each finger of the plurality of fingers is configured to mechanicallyengage one engagement aperture of the plurality of apertures.

In disclosed embodiments, the access portion assembly is configured toengage and/or disengage the ring in a single-handed manner, for examplein a non-rotatably single-handed manner.

BRIEF DESCRIPTION OF THE FIGURES

Various embodiments of the present disclosure are disclosed herein withreference to the drawings, wherein:

FIG. 1 is a perspective view of a surgical access attachment inaccordance with embodiments of the present disclosure;

FIG. 2 is an assembly view of the surgical access attachment of FIG. 1which includes a ring and an access port assembly including a proximalseal retaining portion, a seal, and a distal seal retaining portion;

FIG. 3 is a perspective view of the distal seal retaining portion of theaccess port assembly of FIG. 2;

FIG. 4 is a cross-sectional view of the surgical access attachment ofFIG. 1 taken along line 4-4 of FIG. 1;

FIG. 5 in an enlarged view of the area of detail indicated in FIG. 4;

FIG. 6 is a cross-sectional view of the surgical access attachment ofFIG. 1 taken along line 6-6 of FIG. 1;

FIG. 7 is a cut-away view of a surgical access assembly for use with asurgical access attachment of the present disclosure;

FIG. 8A is a cross-sectional view of the surgical access assembly ofFIG. 7 installed in tissue and showing a proximal portion of thesurgical access assembly in a concave orientation;

FIG. 8B is a cross-sectional view of the surgical access assembly ofFIG. 7 installed in tissue and showing the proximal portion of thesurgical access assembly in a convex orientation;

FIG. 9 is a perspective view of the ring of the surgical accessattachment of FIGS. 1 and 2;

FIGS. 10-12 are cross-sectional views illustrating various steps of theengagement between the surgical access attachment of FIGS. 1-6 and 9with the surgical access device of FIGS. 7-8B;

FIG. 13 is a cross-sectional view of the surgical access attachment ofFIGS. 1-6 and 9 engaged with the surgical access device of FIGS. 7-8B,and showing instrumentation inserted through the surgical accessattachment and the surgical access device;

FIG. 14 is an enlarged view of the area of detail indicated in FIG. 13;

FIG. 15 is a similar view as FIG. 14, but illustrates aproximally-directed force being applied to a flexible tab of the accessport assembly, and the resulting disengagement between the access portassembly and the ring;

FIG. 16 is a perspective view of an alternate embodiment of a surgicalaccess attachment which includes an access portion assembly having twoflexible tabs;

FIG. 17 is a perspective view of an additional alternate embodiment of asurgical access attachment;

FIG. 18 is an assembly view of the surgical access attachment of FIG.17, which includes an overmold assembly having a seal, a retainingassembly, and a ring;

FIG. 19 is an enlarged view of a portion of the retaining assembly ofFIG. 18;

FIG. 20 is a perspective view illustrating a distal surface of theovermold assembly of the surgical access attachment of FIGS. 17-18;

FIG. 21 is a cross-sectional view of the surgical access attachment ofFIGS. 17-18 taken along line 21-21 of FIG. 17; and

FIG. 22 in an enlarged view of the area of detail indicated in FIG. 21.

DETAILED DESCRIPTION

Particular embodiments of the present disclosure will be describedherein with reference to the accompanying figures. As shown in thefigures and as described throughout the following description, and as istraditional when referring to relative positioning on an object, theterm “proximal” refers to the portion of the device that is closer tothe user and the term “distal” refers to the portion of the device thatis farther from the user. In the following description, well-knownfunctions or constructions are not described in detail to avoidobscuring the present disclosure in unnecessary detail.

As defined herein, a surgical site includes an incision in a patient ora natural orifice through which a surgical procedure may be performed.

With initial reference to FIGS. 1 and 2, a surgical access attachment100 is shown in accordance with embodiments of the present disclosure.Surgical access attachment 100 is configured for use with a surgicalaccess device 300 (see FIGS. 7 and 8) for facilitating access through alayer of tissue “T” to a surgical site. More particularly, surgicalaccess attachment 100, or portions thereof, are configured to beselectively removably attached to surgical access device 300, e.g., withthe use of a single hand. That is, surgical access attachment 100, orportions thereof, are configured to engage surgical access device 300 ina simple, one-handed manner, and surgical access attachment 100, orportions thereof, are configured to disengage surgical access device 300in a simple, one-handed manner.

Surgical access attachment 100 includes an access port assembly 110 anda ring 200. Access portion assembly 110 includes a proximal sealretaining portion 120, a distal seal retaining portion 160, and a seal190. Generally, proximal seal retaining portion 120 and distal sealretaining portion 160 are configured to mechanically engage each other(e.g., via snap-fit engagement) and house seal 190 therebetween. Ring200 is configured to selectively mechanically engage a proximal portion310 of surgical access device 300. Access portion assembly 110, whichincludes proximal seal retaining portion 120, distal seal retainingportion 160 and seal 190, is configured to engage surgical access device300 by releasably engaging ring 200, which is engaged with surgicalaccess device 300.

Seal 190 is configured and dimensioned to fit between proximal sealretaining portion 120 and distal seal retaining portion 160. Seal 190 isconfigured to allow a surgical instrument “I” (FIG. 13) and/or aclinician's hand to be inserted therethrough in a sealed relationship.As can be appreciated, various types of seals can be used in connectionwith the present disclosure. Examples of several types of seals aredescribed in commonly-owned U.S. patent application Ser. Nos. 14/337,430filed on Jul. 22, 2014, and 62/021,298 filed on Jul. 7, 2014, each ofwhich being incorporated by reference in its entirety herein.

With particular reference to FIGS. 2, 4 and 5, proximal seal retainingportion 120 includes a rim 122, a plurality of fingers 128, and aflexible tab 130. Rim 122 includes a generally L-shaped cross-section, aradially outer surface 124, and a radially inner surface 126. Eachfinger of the plurality of fingers 128 depends distally from a distalsurface 123 of rim 122. In the embodiment illustrated in FIGS. 4 and 5,for example, each finger of the plurality of fingers 128 ismonolithically formed with rim 122. Additionally, a portion of eachfinger of the plurality of fingers 128 is configured to mechanicallyengage a portion of distal seal retaining portion 160, discussed ingreater detail below.

With reference to FIGS. 2 and 6, flexible tab 130 extends radiallyoutward from rim 122, and includes a proximal portion 132, a leg 134, anengagement portion 136, and a living hinge 138. Living hinge 138interconnects proximal portion 132 and leg 134, and enables leg 134 toflex with respect to proximal portion 132. Engagement portion 136extends radially outward from leg 134 and is configured for engagementby a user to facilitate the flexing of leg 134 with respect to proximalportion 132. Additionally, leg 134 includes an engagement structure 139disposed on a distal end thereof, which is configured to mechanicallyengage a portion of ring 200, discussed in greater detail below.

With reference to FIGS. 2-6, distal seal retaining portion 160 includesa body 162, a proximal edge 164, a proximal shelf 166, a distal shelf168, a plurality of engagement apertures 170, an outer ring 180, and alip 184 (see FIGS. 3 and 6). Proximal edge 164 is configured to at leastpartially radially surround a distal portion of rim 122 of proximal sealretaining portion 120. Proximal shelf 166 is configured to abut distalsurface 123 of rim 122. Distal shelf 168 is configured to engage adistal surface 192 of seal 190.

Each finger of the plurality of fingers 128 is configured to engage oneengagement aperture of the plurality of engagement apertures 170. Moreparticularly, and with reference to FIG. 5, a body 129 of each finger128 is configured to engage a first portion 172 of engagement aperture170, and a lip 131 of each finger 128 is configured to engage a secondportion 174 of engagement aperture 170. Moreover, each finger 128 isflexible such that lip 131 is able to move into and out of engagementwith a wall 174 a defining second portion 174 engagement aperture 170 tofacilitate engagement between finger 128 and engagement aperture 170.Additionally, as can be appreciated, an angled surface 128 a of finger128 and an angled surface 172 a adjacent first portion 172 of engagementaperture 170 also facilitate engagement between finger 128 andengagement aperture 170.

It is envisioned that each finger 128 and each engagement aperture 170can be disengaged from one another by moving lip 131 radially inwardwith respect to engagement aperture 170. More particularly, it isenvisioned that a tool can be inserted through second portion 174 ofengagement aperture 170, into contact with lip 131 of finger 128 to movelip 131 radially inward of wall 174 a, thus enabling proximal movementof proximal seal retaining portion 120 (at least the portion of whichthat is adjacent the finger 128 that has been disengaged from therespective engagement aperture 170) with respect to distal sealretaining portion 160.

While the illustrated embodiments illustrate a particular number offingers 128 and engagement apertures 170, the present disclosureincludes embodiments having more or fewer fingers 128 and/or engagementapertures 170 than the amount shown. Additionally, while the illustratedembodiments show an equal amount of fingers 128 and engagement apertures170, it is envisioned that there are more engagement apertures 170 thanfingers 128. For instance, it is envisioned that there are twice as manyengagement apertures 170 than fingers 128. Such an embodiment enablesproximal seal retaining portion 120 and distal seal retaining portion160 to engage each other in twice as many rotational positions, whichmay be helpful if an engagement aperture 170 becomes damaged, forinstance. Here, it is envisioned that distal seal retaining portion 160includes a second C-shaped projection 181 (described in further detailbelow with regard to the embodiment shown in FIG. 16). Additionally, thecircumferential spacing of fingers 128 and engagement apertures 170 maybe different than the illustrated spacing.

With particular reference FIGS. 2, 14 and 15, outer ring 180 of distalseal retaining portion 160 includes a substantially C-shaped projection181 extending radially outward therefrom. C-shaped projection 181defines an opening 182 therein, which is configured to allow a portionof flexible tab 130 (e.g., engagement structure 139 and a distal portionof leg 134) to extend therethrough.

Referring now to FIGS. 3 and 6, lip 184 of distal seal retaining portion160 is shown. In the illustrated embodiments, lip 184 extends radiallyinward from outer ring 180 in a location that is opposite (i.e.,) 180°from C-shaped projection 181. As shown in FIG. 6, lip 184 is configuredto engage a distal surface 212 of a proximal wall 210 of ring 200.

With particular reference to FIGS. 9-15, ring 200 is shown. Ring 200includes proximal wall 210, a distal wall 220, and an intermediate wall230 which interconnects proximal wall 210 and distal wall 220. As notedabove, ring 200 is configured to mechanically engage proximal portion310 of surgical access device 300. Moreover, ring 200 is configuredmechanically engage proximal portion 310 of surgical access device 300when proximal portion 310 is in a concave orientation (FIG. 8A) or whenproximal portion 310 is in a convex orientation (FIG. 8B). Additionally,ring 200 includes a discontinuity 240 therein, which is configured tofacilitate removable engagement between ring 200 and proximal portion310 of surgical access device 300. When engaged with proximal portion310 of surgical access device 300 (as shown in FIGS. 10-15),intermediate wall 230 of ring 200 is disposed radially inward ofproximal portion 310 (e.g., a proximal lip) of surgical access device300. Additionally, distal surface 212 of proximal wall 210 is positionedproximally of a proximal-most surface of surgical access device 300.

In use, and with reference to FIGS. 4-6, when proximal seal retainingportion 120 and distal seal retaining portion 160 are approximated, aninner surface 165 of proximal edge 164 engages an outer surface 125 ofrim 122, proximal shelf 166 engages distal surface 123 of rim 122, andat least one finger of the plurality of fingers 128 mechanically engagesan engagement aperture of the plurality of engagement apertures 170 tomechanically couple proximal seal retaining portion 120 and distal sealretaining portion 160.

Additionally, and with reference to FIGS. 10-15, to mechanically engageaccess portion assembly 110 with ring 200 (e.g., after ring 200 isengaged with surgical access device 300), lip 184 of distal sealretaining portion 160 is moved into engagement with proximal wall 210 ofring 200 (e.g., lip 184 is moved distally of a distal surface 212 ofproximal wall 210) (see arrows “A” and “B” in FIGS. 10 and 11). Theopposite portion of access portion assembly 110 (e.g., the portion ofaccess portion assembly 110 including flexible tab 130) is then movedgenerally distally (see arrows “C” and “D” in FIGS. 12 and 13), and suchthat engagement structure 139 of flexible tab 130 moves distally ofproximal wall 210 of ring 200 (see FIGS. 13 and 14). With particularreference to FIG. 14, an angled surface 137 on engagement structure 139of flexible tab 130 facilitates the radially outward movement offlexible tab 130 to enable engagement structure 139 to be properlypositioned. It is envisioned that flexible tab 130 is biased radiallyinward such that engagement structure 139 thereof moves toward itsbiased position and into engagement with distal surface 212 of proximalwall 210 of ring 200 after access portion assembly 110 has been movedsufficiently distally with respect to ring 200. It is further envisionedthat a user can exert a distal force upon engagement portion 136 in thegeneral direction of arrows “C” and “D” in FIGS. 12 and 13 to helpengagement structure 139 move radially inward and into engagement withdistal surface 212 of proximal wall 210 of ring 200.

As can be appreciated the engagement between access portion assembly 110and ring 200 can be accomplished single-handedly, thus allowing theclinician more freedom during, before, and after the surgical procedure,for example. More particularly, it is envisioned that a clinician canuse a single handle to quickly and efficiently engage access portionassembly 110 and ring 200, without the need of rotating any components,for instance.

With particular reference to FIG. 15, to disengage access portionassembly 110 from ring 200, a user exerts a generally proximal force(see arrow “E” in FIG. 15) against engagement portion 136. Apredetermined amount of force causes leg 134 of flexible tab 130 to flexa sufficient amount with respect to proximal portion 132, to causeengagement structure 139 to move radially outward and out of engagementwith distal surface 212 of proximal wall 210 of ring 200, therebypermitting the portion of access portion assembly 110 including flexibletab 130 to move proximally with respect to ring 200 (e.g., in thedirection opposite arrows “C” and “D” in FIGS. 12 and 13), which thenallows lip 184 of distal seal retaining portion 160 to move out ofengagement with proximal wall 210 of ring 200 (e.g., in the directionopposite arrows “A” and “B” in FIGS. 10 and 11), and allows completedisengagement between access portion assembly 110 and ring 200.

As can be appreciated the disengagement between access portion assembly110 and ring 200 can be accomplished single-handedly, thus allowing theclinician more freedom during, before, and after the surgical procedure,for example. More particularly, it is envisioned that a clinician canuse a single finger to press proximally or upward on flexible tab 130 toquickly accomplish this disengagement, without the need of rotating orunscrewing any components, for instance.

Referring now to FIG. 16, another embodiment of surgical accessattachment is shown and is referred to as reference character 100 a.Surgical access attachment 100 a is similar to surgical accessattachment 100 of FIG. 1, but surgical access attachment 100 a includestwo flexible tabs 130 a ₁ and 130 a ₂. Here, second flexible tab 130 a₂, effectively replaces lip 184 of distal seal retaining portion 160 ofsurgical access attachment 100. More particularly, an engagementstructure (not explicitly shown in FIG. 16; similar to engagementstructure 139 of surgical access attachment 100) of second flexible tab130 a 2 takes the place of lip 184. (See also FIG. 21, which illustratesa surgical access attachment 1000 including a pair of flexible tabs1280.) Additionally, a distal seal retaining portion 160 a of surgicalaccess attachment 100 a includes first and second C-shaped projections181 a ₁ and 181 a ₂, which each define a respective opening 182 a ₁ and182 a ₂ therein.

Here, as can be appreciated, engagement and disengagement between accessport assembly 110 a and a ring 200 a is accomplished similarly toengagement and disengagement between access port assembly 110 and ring200, as discussed above.

Referring now to FIGS. 17-22 another embodiment of a surgical accessattachment is shown and is referred to as reference character 1000.Surgical access attachment 1000 is configured for use with a surgicalaccess device 300 (see FIGS. 7 and 8) for facilitating access to asurgical site. More particularly, surgical access attachment 1000, orportions thereof, are configured to be selectively removably attached tosurgical access device 300, e.g., with the use of a single hand. Thatis, surgical access attachment 1000, or portions thereof, are configuredto engage surgical access device 300 in a simple, one-handed manner, andsurgical access attachment 1000, or portions thereof, are configured todisengage surgical access device 300 in a simple, one-handed manner.

With particular reference to FIG. 18, surgical access attachment 1000includes a seal assembly 1100, a body portion 1200, and a ring 1300.Seal assembly 1100 includes a seal 1120 and a seal retaining member1140, which are overmolded together. As discussed above with regard toseal 190, seal 1120 can be any suitable type of seal. Seal assembly 1100is configured to mechanically engage body portion 1200, and body portion1200 is configured to be selectively removably attached to ring 1300, asdiscussed in further detail below.

With particular reference to FIGS. 19 and 20, the engagement betweenseal assembly 1100 and body portion 1200 is shown. A distal surface 1142of seal retaining member 1140 includes a plurality of pins 1150extending distally therefrom (FIG. 20), and a proximal surface 1202 ofbody potion 1200 includes a plurality of holes 1210 therein (FIG. 19).Each pin 1150 of seal retaining member 1140 is configured tofrictionally engage one hole of the plurality of holes 1210 of bodyportion 1200 to secure (e.g., removably secure) seal assembly 1100 andbody portion 1200. As can be appreciated, the number of holes of theplurality of holes 1210 helps determine the number of possible radialorientations of seal assembly 1100 with respect to body portion 1200.While the illustrated embodiment shows a certain number of pins 1150 andholes 1210, more or fewer pins 1150 and/or holes 1210 may be included.Additionally, body portion 1200 may include the same number of holes1210 as there are pins 1150, or body portion 1200 may include more holes1210 than pins 1150 without departing from the scope of the presentdisclosure. Further, the orientation and/or spacing of holes 1210 andpins 1150 may differ from the illustrated orientation and spacing.

Referring now to FIGS. 21 and 22, the engagement between body portion1200 and ring 1300 is shown. Body portion 1200 includes a proximal band1220, an intermediate band 1240, a distal band 1260, and a pair offlexible tabs 1280. Proximal band 1220 includes proximal surface 1202having plurality of holes 1210. Intermediate band 1240 interconnectsproximal band 1220 and distal band 1260. Distal band 1260 includes afirst C-shaped projection 1262 defining an opening 1264 therein, and asecond C-shaped projection 1266 defining an opening 1268 therein (seeFIGS. 18 and 22).

With continued reference to FIG. 22, each flexible tab 1280 dependsdistally from proximal band 1220, and includes a leg 1282, an engagementportion 1284, and a living hinge 1286. Living hinge 1286 interconnectsleg 1282 and proximal band 1220, and enables leg 1282 to flex withrespect to proximal band 1220. Engagement portion 1284 extends radiallyoutward from leg 1282 and is configured for engagement by a user tofacilitate the flexing of leg 1282 with respect to proximal band 1220(e.g., to disengage body portion 1200 from ring 1300). A distal portion1288 of leg 1282 of each flexible tab 1280 extends through opening 1264,1268 of respective C-shaped projection 1262, 1266. Additionally, leg1282 includes an engagement structure 1290 disposed on a distal endthereof, which is configured to mechanically engage a portion of ring1300. Ring 1300 is similar to ring 200 of surgical access attachment100, as discussed above.

Additional details of the removable attachment between body portion 1200and ring 1300 are similar to those discussed above with regard to theremovable attachment between access port assembly 110 and ring 200.

The present disclosure also relates to methods of using the devicesdescribed herein. For example, the present disclosure includes methodsof single-handedly engaging and disengaging a surgical access attachment(including a seal assembly associated therein) with a surgical accessdevice.

While several embodiments of the disclosure have been shown in thedrawings, it is not intended that the disclosure be limited thereto, asit is intended that the disclosure be as broad in scope as the art willallow and that the specification be read likewise. Therefore, the abovedescription should not be construed as limiting, but merely as examplesof particular embodiments. Those skilled in the art will envision othermodifications within the scope and spirit of the claims appended hereto.

Persons skilled in the art will understand that the various apparatus,and corresponding methods of use described herein, and shown in theaccompanying drawings, constitute non-limiting, exemplary embodiments ofthe present disclosure, and that additional components and features maybe added to any of the embodiments discussed herein above withoutdeparting from the scope of the present disclosure.

Additionally, persons skilled in the art will understand that theelements and features shown or described in connection with oneexemplary embodiment may be combined with those of another embodimentwithout departing from the scope of the present disclosure, and willappreciate further features and advantages of the presently disclosedsubject matter based on the above-described embodiments and the claims.Accordingly, the present disclosure is not limited by what has beenparticularly shown and described.

Although the foregoing disclosure has been described in some detail byway of illustration and example, for purposes of clarity orunderstanding, it will be obvious that certain changes and modificationsmay be practiced within the scope of the appended claims.

1. (canceled)
 2. A surgical access attachment for use with a surgicalaccess device, the surgical access attachment comprising: a ringconfigured to engage a proximal portion of a surgical access device; andan access portion assembly including a first seal retaining portion, asecond seal retaining portion; a lip; and a tab, each of the lip and thetab is configured to engage a portion of the ring, a distal-most portionof the tab is co-planar with a distal-most portion of the lip; whereinthe access portion assembly is configured to disengage from the ring inresponse to a predetermined amount of force exerted on the tab.
 3. Thesurgical access attachment according to claim 2, wherein the lip isdisposed 180° from the tab.
 4. The surgical access attachment accordingto claim 2, wherein the lip is configured to selectively engage thering.
 5. The surgical access attachment according to claim 2, whereinthe tab includes an engagement structure configured to selectivelyengage the ring.
 6. The surgical access attachment according to claim 2,wherein the access portion assembly is configured to disengage from thering in response to a predetermined amount of proximally-directed forceexerted on the tab.
 7. The surgical access attachment according to claim2, wherein the tab and the lip of the access portion assembly areconfigured to removably engage the ring.
 8. The surgical accessattachment according to claim 2, wherein the tab extends from the firstseal retaining portion and at least partially through an opening of thesecond seal retaining portion.
 9. The surgical access attachmentaccording to claim 2, wherein the first seal retaining portion includesa plurality of fingers, and wherein the second seal retaining portionincludes a plurality of engagement apertures, each finger of theplurality of fingers is configured to mechanically engage one engagementaperture of the plurality of engagement apertures.
 10. The surgicalaccess attachment according to claim 2, wherein the access portionassembly is configured to non-rotatably engage the ring in asingle-handed manner, and wherein the access portion assembly isconfigured to non-rotatably disengage the ring in a single-handedmanner.
 11. The surgical access attachment according to claim 2, whereinthe lip extends from the second seal retaining portion, and wherein thetab extends from the first seal retaining portion.
 12. The surgicalaccess attachment according to claim 2, wherein each of the lip and thetab is configured to engage a distal surface of a proximal wall of thering.
 13. A surgical access attachment or use with a surgical accessdevice, the surgical access attachment comprising: a ring configured toengage a proximal portion of a surgical access device; and an accessportion assembly including a first seal retaining portion, a second sealretaining portion, a lip, and a tab, the tab extending from the firstseal retaining portion and at least partially through an opening of thesecond seal retaining portion, each of the lip and the tab is configuredto engage a portion of the ring; wherein the access portion assembly isconfigured to disengage from the ring in response to a predeterminedamount of force exerted on the tab.
 14. The surgical access attachmentaccording to claim 13, wherein the lip is disposed 180° from the tab 15.The surgical access attachment according to claim 13, wherein adistal-most portion of the tab is co-planar with a distal-most portionof the lip.
 16. The surgical access attachment according to claim 13,wherein the lip extends from the second seal retaining portion, andwherein the tab extends from the first seal retaining portion.
 17. Asurgical access attachment with a surgical access device, the surgicalaccess attachment comprising: a ring configured to engage a proximalportion of a surgical access device; and an access portion assemblyincluding a first seal retaining portion, a second seal retainingportion, a lip, and a tab, each of the lip and the tab is configured toengage a portion of the ring, the first seal retaining portion includinga plurality of fingers and the second seal retaining portion including aplurality of engagement apertures, each finger of the plurality offingers is configured to mechanically engage one engagement aperture ofthe plurality of engagement apertures; wherein the access portionassembly is configured to disengage from the ring in response to apredetermined amount of force exerted on the tab.
 18. The surgicalaccess attachment according to claim 17, wherein the tab extends fromthe first seal retaining portion and at least partially through anopening of the second seal retaining portion.
 19. The surgical accessattachment according to claim 17, wherein a distal-most portion of thetab is co-planar with a distal-most portion of the lip.
 20. The surgicalaccess attachment according to claim 17, wherein the lip extends fromthe second seal retaining portion, and wherein the tab extends from thefirst seal retaining portion.